UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of June 2026

Commission File Number: 001-39173

NovaBridge Biosciences

2440 Research Boulevard, Suite 400

Rockville, MD 20850

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒                Form 40-F ☐

On June 16, 2026, NovaBridge Biosciences issued a press release, a copy of which is furnished herewith as Exhibit 99.1.

EXHIBIT INDEX


Exhibit No.	Description

99.1	Press Release - NovaBridge Receives FDA Fast Track Designation for Givastomig in First-Line HER2-Negative Metastatic Gastric Cancer

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


NovaBridge Biosciences

By	:	/s/ Xi-Yong Fu
Name	:	Xi-Yong (Sean) Fu
Title	:	Chief Executive Officer

Date: June 16, 2026

NovaBridge Biosciences 6-K